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High Energy Radiation From Magnetized Neutron Stars
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Book Synopsis High-Energy Radiation from Magnetized Neutron Stars by : Peter Mészáros
Download or read book High-Energy Radiation from Magnetized Neutron Stars written by Peter Mészáros and published by University of Chicago Press. This book was released on 1992-06 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron stars, the most extreme state of matter yet confirmed, are responsible for much of the high-energy radiation detected in the universe. Mèszàros provides a general overview of the physics of magnetized neutron stars, discusses in detail the radiation processes and transport properties relevant to the production and propagation of high-energy radiation in the outer layers of these objects, and reviews the observational properties and theoretical models of various types of neutron star sources.
Book Synopsis Energetic Radiation from Magnetized Neutron Stars by :
Download or read book Energetic Radiation from Magnetized Neutron Stars written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-Energy Radiation from Magnetized Neutron Stars by : Peter Mészáros
Download or read book High-Energy Radiation from Magnetized Neutron Stars written by Peter Mészáros and published by University of Chicago Press. This book was released on 1992-06 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron stars, the most extreme state of matter yet confirmed, are responsible for much of the high-energy radiation detected in the universe. Mèszàros provides a general overview of the physics of magnetized neutron stars, discusses in detail the radiation processes and transport properties relevant to the production and propagation of high-energy radiation in the outer layers of these objects, and reviews the observational properties and theoretical models of various types of neutron star sources.
Book Synopsis The Electromagnetic Spectrum of Neutron Stars by : Altan Baykal
Download or read book The Electromagnetic Spectrum of Neutron Stars written by Altan Baykal and published by Springer Science & Business Media. This book was released on 2006-01-20 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron stars hold a central place in astrophysics, not only because they are made up of the most extreme states of the condensed matter, but also because they are, along with white dwarfs and black holes, one of the stable configurations that stars reach at the end of stellar evolution. Neutron stars posses the highest rotation rates and strongest magnetic fields among all stars. They radiate prolifically, in high energy electromagnetic radiation and in the radio band. This book is devoted to the selected lectures presented in the 6th NATO-ASI series entitled "The Electromagnetic Spectrum of Neutron Stars" in Marmaris, Turkey, on 7-18 June 2004. This ASI is devoted to the spectral properties of neutron stars. Spectral observations of neutron stars help us to understand the magnetospheric emission processes of isolated radio pulsars and the emission processes of accreting neutron stars. This volume includes spectral information from the neutron stars in broadest sense, namely neutrino and gravitational radiation along with the electromagnetic spectrum. We believe that this volume can serve as graduate level of text including the broad range of properties of neutron stars.
Book Synopsis The X-ray Emission and Population of Highly Magnetized Neutron Stars by : Scott Olausen
Download or read book The X-ray Emission and Population of Highly Magnetized Neutron Stars written by Scott Olausen and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Over the past few decades, advances in X-ray and gamma-ray astronomy have greatly expanded our knowledge of the neutron-star family. One important recent discovery has been that of the "magnetars," isolated neutron stars whose radiation and occasional bursting activity is thought to be powered by their very high magnetic fields (10^14-10^15 G as inferred from timing), unlike ordinary pulsars that are powered by their rotational energy. There do, however, exist rotation-powered pulsars with inferred magnetic fields that approach those of the magnetars (~10^13 G). These two groups might therefore be expected to show some similarities in their properties or behaviour. Careful study of both the high-magnetic-field pulsars and magnetars, then, may help us to understand magnetar physics and determine their relations and connections with the rest of the pulsar population.In Chapter 3, I present the results of two XMM-Newton observations of the high-magnetic-field radio pulsar PSR J1734-3333. We successfully detect the X-ray counterpart of the pulsar. Its spectrum fits well to a blackbody with temperature 300 +/- 60 eV, and its bolometric luminosity is L_bb = 2.0 x 10^32 erg/s, or ~0.4% of its spin-down power, for a distance of 6.1 kpc. We detect no X-ray pulsations from the source, setting a 1 sigma upper limit on the pulsed fraction of 60% in the 0.5-3 keV band. We compare PSR J1734-3333 to other rotation-powered pulsars of similar age and find that it is significantly hotter, supporting the hypothesis that the magnetic field affects the observed thermal properties of pulsars. We also tabulate the properties of this and all other known high-B radio pulsars with measured thermal X-ray luminosities or luminosity upper limits, and speculate on a possible correlation between L_X and B.In Chapter 4, I present an analysis of the extended emission around the magnetar 1E 1547.0-5408. Based on four XMM-Newton observations taken with the source in various stages from outburst to quiescence, we find that the extended emission flux is highly variable and strongly correlated with the flux of the magnetar. From this result, as well as spectral and energetic considerations, we conclude that the extended emission is dominated by a dust-scattering halo and not a pulsar wind nebula (PWN), as has been previously argued. We obtain an upper limit on the 2-10 keV flux of a possible PWN of 4.7 x 10^-14 erg/s/cm^2, three times less than the previously claimed value. We do, however, find strong evidence for X-ray emission from a supernova remnant surrounding the pulsar, as previously reported.Finally, I present a study of the magnetar population as a whole in Chapter 5, with a catalog of the 26 currently known magnetars and magnetar candidates. Tables are provided of astrometric and timing data for all catalog sources, as well as of their observed radiative properties, particularly the spectral parameters of the quiescent X-ray emission. We show histograms of the spatial and timing properties of the magnetars and compare them with the known pulsar population. We measure the scale height of magnetars to be in the range of 20-31 pc, assuming they are exponentially distributed. This range is smaller than that measured for OB stars, providing evidence that magnetars are born from the most massive O stars. From the same fits, we find that the Sun lies ~13-22 pc above the Galactic plane, consistent with previous measurements. We confirm previously identified correlations between quiescent X-ray luminosity, L_X, and magnetic field, B, as well as X-ray spectral power-law indexes, Gamma and B, and show evidence for an excluded region in a plot of L_X versus Gamma. We observe that while there is a clear correlation between the hard and soft X-ray fluxes in magnetars, the radio-detected magnetars all have low, soft X-ray flux, suggesting, if anything, that the two bands are anti-correlated." --
Book Synopsis Essential Radio Astronomy by : James J. Condon
Download or read book Essential Radio Astronomy written by James J. Condon and published by Princeton University Press. This book was released on 2016-04-05 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ideal text for a one-semester course in radio astronomy Essential Radio Astronomy is the only textbook on the subject specifically designed for a one-semester introductory course for advanced undergraduates or graduate students in astronomy and astrophysics. It starts from first principles in order to fill gaps in students' backgrounds, make teaching easier for professors who are not expert radio astronomers, and provide a useful reference to the essential equations used by practitioners. This unique textbook reflects the fact that students of multiwavelength astronomy typically can afford to spend only one semester studying the observational techniques particular to each wavelength band. Essential Radio Astronomy presents only the most crucial concepts—succinctly and accessibly. It covers the general principles behind radio telescopes, receivers, and digital backends without getting bogged down in engineering details. Emphasizing the physical processes in radio sources, the book's approach is shaped by the view that radio astrophysics owes more to thermodynamics than electromagnetism. Proven in the classroom and generously illustrated throughout, Essential Radio Astronomy is an invaluable resource for students and researchers alike. The only textbook specifically designed for a one-semester course in radio astronomy Starts from first principles Makes teaching easier for astronomy professors who are not expert radio astronomers Emphasizes the physical processes in radio sources Covers the principles behind radio telescopes and receivers Provides the essential equations and fundamental constants used by practitioners Supplementary website includes lecture notes, problem sets, exams, and links to interactive demonstrations An online illustration package is available to professors
Book Synopsis High Energy Phenomena Around Collapsed Stars by : F. Pacini
Download or read book High Energy Phenomena Around Collapsed Stars written by F. Pacini and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Study Institute, Cargèse, Corsica, France, September 2-13, 1985
Book Synopsis Very High Energy Cosmic Gamma Radiation by : Felix A. Aharonian
Download or read book Very High Energy Cosmic Gamma Radiation written by Felix A. Aharonian and published by World Scientific. This book was released on 2004 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gamma ray astronomy, the branch of high energy astrophysics that studies the sky in energetic ?-ray photons, is destined to play a crucial role in the exploration of nonthermal phenomena in the Universe in their most extreme and violent forms. The great potential of this discipline offers impressive coverage of many OC hot topicsOCO of modern astrophysics and cosmology, such as the origin of galactic and extragalactic cosmic rays, particle acceleration and radiation processes under extreme astrophysical conditions, and the search for dark matter."
Book Synopsis Isolated Neutron Stars: From the Surface to the Interior by : Silvia Zane
Download or read book Isolated Neutron Stars: From the Surface to the Interior written by Silvia Zane and published by Springer Science & Business Media. This book was released on 2007-05-22 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collation of the contributions presented at a major conference on isolated neutron stars held in London in April 2006. Forty years after the discovery of radio pulsars it presents an up-to-date description of the new vision of isolated neutron stars that has emerged in recent years. The great variety of isolated neutron stars, from pulsars to magnetars, is well covered by descriptions of recent observational results and presentations of the latest theoretical interpretation of these data.
Book Synopsis Physics and Astrophysics of Ultra High Energy Cosmic Rays by : M. Lemoine
Download or read book Physics and Astrophysics of Ultra High Energy Cosmic Rays written by M. Lemoine and published by Springer. This book was released on 2008-01-11 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International School on Physics and Astrophysics of Ultra High Energy Cosmic Rays (UHECR2000) was held at the Observatoire de Paris–Meudon on June 26-29, 2000. This was the ?rst international school speci?cally dedicated to ultra high energy cosmic rays. Its aim was to familiarize with and attract students, physicists and astronomers into this quickly developing newresearch ?eld. The mysterious and currently unknown origin of the most energetic par- cles observed in Nature has triggered in recent years theoretical speculations ranging from electromagnetic acceleration to as yet undiscovered physics - yond the Standard Model. It has also lead to the development of several new detection concepts and experimental projects, some of which are currently - der construction. By its nature, the ?eld of ultra high energy cosmic rays is therefore highly interdisciplinary and borrows from astrophysics and cosmology, via particle physics, to experimental physics and observational astronomy. One main aspect of the school was to emphasize and take advantage of this interd- ciplinarity. The lectures were grouped into subtopics and are reproduced in this volume in the following order: After a general introductory lecture on cosmic rays follow two contributions on experimental detection techniques, followed by three lectures on acceleration in astrophysical objects. The next four contri- tions cover all major aspects of propagation and interactions of ultra high energy radiation, including speculative issues such as newinteractions.
Book Synopsis Literature 1987, Part 1 by : S. Böhme
Download or read book Literature 1987, Part 1 written by S. Böhme and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 1300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astronomy and Astrophysics Abstracts aims to present a comprehensive documen tation of the literature concerning all aspects of astronomy, astrophysics, and their border fields. It is devoted to the recording, summarizing, and indexing of the relevant publications throughout the world. Astronomy and Astrophysics Abstracts is prepared by a special department of the Astronomisches Rechen-Institut under the auspices of the International Astronomical Union. Volume 43 records literature published in 1987 and received before August 15, 1987. Some older documents which we received late and which are not surveyed in earlier volumes are included too. We acknowledge with thanks contributions of our colleagues all over the world. We also express our gratitude to all organiza tions, observatories, and publishers which provide us with complimentary copies of their publications. Starting with Volume 33, all the recording, correction, and data processing work was done by means of computers. The recording was done by our technical staff members Ms. Helga Ballmann, Ms. Beate Gobel, Ms. Monika Kohl, Ms. Sylvia Matyssek, Ms. Doris Schmitz-Braunstein, Ms. Utta-Barbara Stegemann. Mr. Jochen Heidt and Mr. Kristopher Polzine supported our task by careful proof reading. It is a pleasure to thank them all for their encouragement. Heidelberg, October 1987 The Editors Contents Introduction . . . . . . . . . . . 1 Concordance Relation: PHYS-AAA 3 Abbreviations 5 Periodicals, Proceedings, Books, Activities 001 Periodicals . . . . . . . . . . . 10 002 Bibliographical Publications, Documentation, Catalogues, Data Bases 50 003 Books ...... .
Book Synopsis Neutron Star Electromagnetic Field Structure by : Hugh O. Thurman (III.)
Download or read book Neutron Star Electromagnetic Field Structure written by Hugh O. Thurman (III.) and published by . This book was released on 2004 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation investigates the neutron star magnetic field from generation to radiation production. We have investigated the spontaneous magnetization process to explain the magnetic field generation. This magnetization is then applied to determine the electromagnetic field structure of the neutron star. As an application of these two calculations, we briefly investigate several radiation mechanisms that are closely related to stellar magnetic fields. Neutron star magnetic field generation is studied through the spontaneous magnetization process. This process was studied in the non-relativistic, ultra-relativistic, and rigorous relativistic dispersion regimes for the neutrons. Both analytical and numerical approaches show that a phase transition is present for a density near 10 38 cm -3 and a temperature near 10 9 K . This density is consistent with most neutron star models. Using the magnetized interior, the neutron star electromagnetic field is derived from the vector potential. The derived magnetic field is more complicated than just a magnetic dipole which is the most common approximation to the magnetic field. The electromagnetic field structure is derived under the Goldreich-Julian approach. Finally this electromagnetic field is applied to three radiation mechanisms in attempt to understand the high-frequency radiation observed from neutron stars. The processes studied are curvature radiation, pair production, and synchrotron radiation. The curvature radiation is most greatly affected by the electromagnetic field because the radius of curvature is reduced by a factor 10 when just the quadrapole term is included. This directly affects the number of photons energetic enough to undergo pair production. These electron-positron pairs are also more energetic and the synchrotron radiation spectrum is affected by not only the injection angle but the magnetic field curvature as well.
Book Synopsis The Universe in Gamma Rays by : Volker Schönfelder
Download or read book The Universe in Gamma Rays written by Volker Schönfelder and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: After describing cosmic gamma-ray production and absorption, the instrumentation used in gamma-ray astronomy is explained. The main part of the book deals with astronomical results, including the somewhat surprising result that the gamma-ray sky is continuously changing.
Book Synopsis Disk Accretion Onto Weakly Magnetized Neutron Stars by : Włodzimierz Kluʹzniak
Download or read book Disk Accretion Onto Weakly Magnetized Neutron Stars written by Włodzimierz Kluʹzniak and published by . This book was released on 1987 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Accreting Neutron Stars by : Wolfgang Brinkmann
Download or read book Accreting Neutron Stars written by Wolfgang Brinkmann and published by . This book was released on 1982 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Energetic Gamma-Ray Experiment Telescope (EGRET) Science Symposium by : Carl Fichtel
Download or read book The Energetic Gamma-Ray Experiment Telescope (EGRET) Science Symposium written by Carl Fichtel and published by . This book was released on 1990 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Frontiers in High Energy Density Physics by : National Research Council
Download or read book Frontiers in High Energy Density Physics written by National Research Council and published by National Academies Press. This book was released on 2003-05-11 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent scientific and technical advances have made it possible to create matter in the laboratory under conditions relevant to astrophysical systems such as supernovae and black holes. These advances will also benefit inertial confinement fusion research and the nation's nuclear weapon's program. The report describes the major research facilities on which such high energy density conditions can be achieved and lists a number of key scientific questions about high energy density physics that can be addressed by this research. Several recommendations are presented that would facilitate the development of a comprehensive strategy for realizing these research opportunities.
